Panasonic KX-NSX2000 Operating Manual page 24

1.1.5 Before Operating the Telephones
Telephone Company
Doorphone & Door Opener
ITSP: Internet Telephony Service Provider
*1
DCE: Data Circuit Terminating Equipment
*2
24 Operating Manual
Business Communication Server
Remote PC
IP Softphone
CTI Server
PC
Private ITSP*1
IP Network Network
Router
DCE
(e.g., ADSL
Modem)
IP-PT
SIP Phone
IP-CS PS
* 2